WIKA 762.14 User Manual [en, de, fr]
Operating Instructions
Betriebsanleitung
Mode d'emploi
Pressure gauges Model 7 per directive 94/9/EC (ATEX)
Druckmessgeräte Typ 7 nach Richtlinie 94/9/EG (ATEX)
Manomètres Type 7 selon directive 94/9/EG (ATEX)
II 2 GD c TX
GB
D
F
Model 732.51.100 per ATEX Model 732.14.100 per ATEX
Operating instructions Model 7 per ATEX Page 1 - 10
GB
Betriebsanleitung Typ 7 nach ATEX Seite 11 - 18
D
F
Mode d’emploi Type 7 selon ATEX Page 19 - 26
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Contents
Contents
1. Safety instructions 4
2. Description 4
3. Technical data and intended use 5
4. Commissioning 8
5. Maintenance and servicing / cleaning 8
6. Repairs 8
7. Disposal 8
Appendix 1: Declaration of conformity for Models 73x.51
and 73x.31 9
Appendix 2: Declaration of conformity for Models 73x.14
and 76x.14 10
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WIKA Operating instructions pressure gauges Model 7 per ATEX
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1. Safety instructions / 2. Description
1. Safety instructions
The appropriate national safety regulations (i.e. EN 837-2 Selection and installation recommendations for pressure gauges) must
GB
!
Caution
Serious injuries and/or damage can occur should the appropriate regulations
not be observed
Only appropriately qualified personnel should work on these instruments
The actual maximum surface temperature is not generated by the
instruments themselves, but primarily by the respective medium temperature!
For maximum permissible medium temperatures see Table 2.
be observed when installing, commissioning and operating these
instruments.
2. Description
Nominal size 100 and 160 mm
The pressure gauges measure the pressure with elastic diaphragm measuring
elements
The measuring characteristics are in accordance with the EN 837-3 standards
In addition, the case, bezel ring and the pressurised components of Model
73x.31 also meet the requirements of this standard, relating to safety pattern
pressure gauges with a solid baffle wall (code S3).
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WIKA Operating instructions pressure gauges Model 7 per ATEX
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3. Technical data and intended use
3. Technical data and intended use
Pressure limitation
Model 73x.51/31: Steady: full scale value
Fluctuating: 0.9 x full scale value
Table 1: Max. working pressure / Overpressure safety maximum in bar
Pressure ranges Working pressure max.
(static pressure)
Standard Option
0 ... 16 to 0 ... 40 mbar 2.5 6 2.5 0 ... 60 to 0 ...
0 ... 400 mbar 25 40 4 40
0 ... 0.6 bar 25 40 6 40
0 ... 1 bar 25 40 10 40
0 ... 1.6 bar 25 40 16 40
0 ... 2.5 to 0 ... 25 bar 25 40 25 40
250 mbar
6 10 2.5 6
Overpressure safety, single,
dual or alternating sides
Standard Option
Model 73x.14: Steady: full scale value
Fluctuating: 0.9 x full scale value
Overpressure safety: 40, 100, 250 or 400 bar
Process connection
In accordance with the general technical regulations for pressure gauges
(i.e. EN 837-2 „Selection and installation recommendations for pressure
gauges“).
When screwing gauges in, the force required for this must not be applied
through the case, but rather through the spanner flats (using a suitable tool)
provided for this purpose on the square shaft of standard connections.
GB
Temperature effect
When the temperature of the measuring system deviates from the reference
temperature (+20 °C): max. ±0.5 %/10 K of full scale value
IP Ingress protection
IP 54 per EN 60 529 / IEC 60 529
(with liquid filling IP 65)
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3. Technical data and intended use
Operating Temperature
Ambient: -20 ... +60 °C
with option silicone oil filling: -40 ... +60 °C
GB
Medium: The permissible medium temperature does not only depend on the
instrument design, but also on the ignition temperature of the
surrounding explosive atmosphere. Both aspects must be taken
into account.
For maximum permissible medium temperatures see Table 2.
Attention! In the case of gaseous substances, the temperature may increase
due to compression warming. In these cases it may be necessary to throttle
the rate of change of pressure or reduce the permissible temperature of the
pressure medium.
Table 2: Permissible medium temperature
Temperature Class of the
ambient atmosphere
Maximum permissible medium temperature
(in the pressure system)
(ignition temperature)
T 6 (85 °C < T ≤ 100 °C) +70 °C
T 5 (100 °C < T ≤ 135 °C) +85 °C
T 4 (135 °C < T ≤ 200 °C) +100 or +120 °C
T 3 (200 °C < T ≤ 300 °C) +100 or +185 °C
T 2 (300 °C < T ≤ 450 °C) +100 or +200 °C
T 1 (T > 450 °C) +100 or +200 °C
1) The higher values only apply to special versions with higher permissible media temperatures.
1)
1)
1)
1)
Materials
Wetted parts: Pressure connections and pressure chamber: stainless steel
(Model 73x.51/31) Pressure element ≤ 0.25 bar: stainless steel
> 0.25 bar: NiCr-alloy (Inconel)
Air bleeding plugs:
stainless steel (option: ranges ≥ 0,4 bar)
Wetted parts: Pressure connections and pressure flanges: stainless steel
(Model 73x.14) Pressure elements: stainless steel/NiCr-alloy (Inconel)
Sealing rings: FPM/FKM
Venting of the pressure chambers:
stainless steel (option: ranges ≥ 0,4 bar)
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WIKA Operating instructions pressure gauges Model 7 per ATEX
3. Technical data and intended use
Movement: Stainless steel
Dial and pointer: Aluminium
Case, bezel ring: Stainless steel
(Model 73x.31: with blow-out back)
Window: Laminated safety glass
Installation
Nominal position per EN 837-3 / 9.6.6 Figure 7: 90° (
⊥ )
Process connection: lower mount (LM)
In order to ensure that, with Model 73x.31 pressure can be safely and
reliably vented through the case back, a distance of at least 25 mm must be
left free behind the case!
In order to avoid any additional heating, the instruments must not be
exposed to direct solar irradiation while in operation!
With filled versions the ventilating valve at the top of the case must be
opened prior to commissioning!
Permissible vibration load at the mounting point
The instruments should always be installed in locations free from vibration.
If necessary, it is possible to isolate the instrument from the mounting point
by installing a flexible connection line between the measuring point and the
pressure gauge and mounting the instrument on a suitable bracket.
GB
If this is not possible, the following limit values must not be exceeded:
Dry gauges: Frequency range < 150 Hz
(Model 732) Acceleration < 0.7 g (7 m/s
2
)
Liquid-filled gauges: Frequency range < 150 Hz
(Model 733) Acceleration < 4 g (40 m/s
2
)
The liquid filling must be checked on a regular basis.
The liquid level must not drop below 75 % of the gauge diameter.
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4. Commissioning ... 7. Disposal
4. Commissioning
During the commissioning process pressure peaks must be avoided at all
costs. Open the shut-off valves slowly.
GB
5. Maintenance and servicing / cleaning
The instruments require no maintenance or servicing.
The indicator should be checked once or twice every 12 months.
The instrument must be disconnected from the process to check with a
pressure testing device.
The instruments should be cleaned with a damp cloth moistened with soap
solution.
Any residual pressure medium contained in the pressure element may be
hazardous or toxic. This should be taken into account when handling and
storing pressure gauges which have been removed.
6. Repairs
Repairs are only to be carried out by the manufacturer or appropriately trained
personnel.
For further details see WIKA data sheet for the respective basic gauge:
Model 73x.51 and 73x.31: Data Sheet PM 07.05
Model 73x.14: Data Sheet PM 07.13
7. Disposal
Dispose of instrument components and packaging materials in accordance
with the respective waste treatment and disposal regulations of the region or
country to which the instrument is supplied.
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WIKA Operating instructions pressure gauges Model 7 per ATEX
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Appendix 1
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